<template>
    <div>
        <img v-bind:src="options.img"
             @click="editCropper()"
             title="点击上传头像"
             class="img-circle img-lg" />
        <el-dialog :title="title"
                   :visible.sync="open"
                   width="800px"
                   append-to-body
                   @opened="modalOpened">
            <el-row>
                <el-col :xs="24"
                        :md="12"
                        :style="{height: '350px'}">
                    <vue-cropper ref="cropper"
                                 :img="options.img"
                                 :info="true"
                                 :autoCrop="options.autoCrop"
                                 :autoCropWidth="options.autoCropWidth"
                                 :autoCropHeight="options.autoCropHeight"
                                 :fixedBox="options.fixedBox"
                                 @realTime="realTime"
                                 v-if="visible" />
                </el-col>
                <el-col :xs="24"
                        :md="12"
                        :style="{height: '350px'}">
                    <div class="avatar-upload-preview">
                        <img :src="previews.url"
                             :style="previews.img" />
                    </div>
                </el-col>
            </el-row>
            <br />
            <el-row>
                <el-col :lg="2"
                        :md="2">
                    <el-upload action="#"
                               :http-request="requestUpload"
                               :show-file-list="false"
                               :before-upload="beforeUpload">
                        <el-button size="small">
                            上传
                            <i class="el-icon-upload el-icon--right"></i>
                        </el-button>
                    </el-upload>
                </el-col>
                <el-col :lg="{span: 1, offset: 2}"
                        :md="2">
                    <el-button icon="el-icon-plus"
                               size="small"
                               @click="changeScale(1)"></el-button>
                </el-col>
                <el-col :lg="{span: 1, offset: 1}"
                        :md="2">
                    <el-button icon="el-icon-minus"
                               size="small"
                               @click="changeScale(-1)"></el-button>
                </el-col>
                <el-col :lg="{span: 1, offset: 1}"
                        :md="2">
                    <el-button icon="el-icon-refresh-left"
                               size="small"
                               @click="rotateLeft()"></el-button>
                </el-col>
                <el-col :lg="{span: 1, offset: 1}"
                        :md="2">
                    <el-button icon="el-icon-refresh-right"
                               size="small"
                               @click="rotateRight()"></el-button>
                </el-col>
                <el-col :lg="{span: 2, offset: 6}"
                        :md="2">
                    <el-button type="primary"
                               size="small"
                               @click="uploadImg()">提 交</el-button>
                </el-col>
            </el-row>
        </el-dialog>
    </div>
</template>

<script>
import store from '@/store'
import { VueCropper } from 'vue-cropper'
import { uploadAvatar } from '@/api/system/user'

export default {
    components: { VueCropper },
    props: {
        user: {
            type: Object,
        },
    },
    data() {
        return {
            // 是否显示弹出层
            open: false,
            // 是否显示cropper
            visible: false,
            // 弹出层标题
            title: '修改头像',
            options: {
                img: store.getters.avatar, //裁剪图片的地址
                autoCrop: true, // 是否默认生成截图框
                autoCropWidth: 200, // 默认生成截图框宽度
                autoCropHeight: 200, // 默认生成截图框高度
                fixedBox: true, // 固定截图框大小 不允许改变
            },
            previews: {},
        }
    },
    methods: {
        // 编辑头像
        editCropper() {
            this.open = true
        },
        // 打开弹出层结束时的回调
        modalOpened() {
            this.visible = true
        },
        // 覆盖默认的上传行为
        requestUpload() {},
        // 向左旋转
        rotateLeft() {
            this.$refs.cropper.rotateLeft()
        },
        // 向右旋转
        rotateRight() {
            this.$refs.cropper.rotateRight()
        },
        // 图片缩放
        changeScale(num) {
            num = num || 1
            this.$refs.cropper.changeScale(num)
        },
        // 上传预处理
        beforeUpload(file) {
            if (file.type.indexOf('image/') == -1) {
                this.msgError(
                    '文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。'
                )
            } else {
                const reader = new FileReader()
                reader.readAsDataURL(file)
                reader.onload = () => {
                    this.options.img = reader.result
                }
            }
        },
        // 上传图片
        uploadImg() {
            this.$refs.cropper.getCropBlob((data) => {
                let formData = new FormData()
                // console.log(data)
                let aTime = new Date().getTime() //取时间戳，给文件命名
                let fileName = aTime + '.' + data.type.substr(6) //给文件名加后缀
                let file = new window.File([data], fileName, {
                    type: data.type,
                }) //blob转file
                formData.append('avatarfile', file)
                uploadAvatar(formData).then((response) => {
                    this.open = false
                    this.options.img = response.imgUrl
                    store.commit('SET_AVATAR', this.options.img)
                    this.msgSuccess('修改成功')
                    this.visible = false
                })
            })
        },
        // 实时预览
        realTime(data) {
            this.previews = data
        },
    },
}
</script>
